User Manual

Redpine Signals, Inc. Page 46
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RS9110-N-11-24
Evaluation Board User Guide
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4 Using the Evaluation Board in SPI
mode
To use the EVB in the SPI mode, an MCU Host
platform must be interfaced with the module using
the SPI interface. The firmware package for the Wi-
Fi module comes with a reference driver in source
code form. The reference driver can be ported to the
Host MCU platform to interact and operate the Wi-Fi
module. The Programming Reference Manual (PRM)
is the most important document to help users to
operate the module in SPI mode. For
comprehensive details on all the SPI commands that
can be used to configure, operate and upgrade the
module, please refer to the Programming Reference
Manual. The set-ups used in the previous sections in
UART mode can be used in SPI mode as well.
Note: 1.There are two ways of powering the EVB:
either use the USB inlet (USB adapter provided with
the EVB) OR the pin #4 of the header.
2. Pin # 1 (SDIO_DATA3) should be left open.
3. Pin # 2 (SPI_CS) SPI chip Select
4. Pin # 3 VSS
5. Pin # 4 VDD
6. Pin # 5 (SPI_CLK) SPI Clock
7. Pin # 6 VSS
8. Pin # 7 SPI_DATAIN = MOSI
9. Pin # 8 SPI_DATAOUT = MISO
10. Pin # 9 The interrupt signal SPI_INTR is an active high signal.
11. Pin # 10 Not used.
Figure 13: Connections in SPI mode
Host MCU
SPI MOSI (SPI Header)
SPI MISO
(SPI Header)
SPI CLK
(SPI Header
SPI CS (SPI Header)
INTERRUPT
(SPI Header)
RS9110-N-11-
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SPI
MOSI
SPI MISO
SPI CLK
SPI CS
INTERRUPT
Figure 16:
Header J7
SPI TOP View